That's an interesting topic! Yellow tea in China is categorized into "tippy/bud tea" and "leafy tea". The yellow bud tea (such as Junshan Yinzhen and huangya) are the upscale ones but a problem with almost all of them is nowadays they are made almost the same as green tea and lack features of yellow tea. Junshan Yinzhen is very hard to get, and most of the already hard-to-obtain ones are actually green tea with only the title of Junshan. Same problem with Mengding Yellow Bud. Another bud tea, Huo Shan Yellow Bud, was "officially" converted to green tea in recent decades.

On the other hand, the leafy yellow teas are more likely to be really "yellow tea" and not green tea. But most of them are considered intermediate to lower grade teas and are only popular in local markets within their own counties.